TPS72325DBVR: Texas Instruments' High-Performance Negative Linear Voltage Regulator

The TPS72325DBVR from Texas Instruments is an advanced negative linear voltage regulator designed to deliver precision power regulation in modern electronic systems. This high-efficiency IC provides a fixed -2.5V output with exceptional stability, making it perfect for sensitive analog applications, industrial controls, and portable devices requiring reliable negative voltage rails.

Comprehensive Technical Specifications

Core Features

• Output Voltage: Fixed -2.5V 2% accuracy
• Output Current: 200mA continuous
• Input Voltage Range: -3V to -10V
• Dropout Voltage: Only 0.5V at full load
• Package: Space-saving SOT-23-5 (DBV)

Performance Characteristics

The TPS72325DBVR excels in demanding applications with:

• Excellent line regulation: 0.05%/V (typical)
• Superb load regulation: 0.3% (typical)
• Ultra-low quiescent current: 200 A (typical)
• High PSRR: 65dB at 1kHz
• Wide temperature range: -40 C to +125 C

Advanced Design Features

Intelligent Control and Protection

The TPS72325DBVR incorporates sophisticated protection mechanisms:

• Thermal shutdown with hysteresis
• Current limiting protection
• Short-circuit protection
• Enable/Shutdown control pin

Noise Reduction Technology

With 65dB PSRR at 1kHz, this regulator significantly reduces power supply noise, making it ideal for:

• Precision analog circuits
• Data acquisition systems
• RF and communication equipment
• Sensitive measurement instruments

Application-Specific Design Considerations

For Analog Circuit Power

When powering operational amplifiers or data converters:

• Place 1 F ceramic capacitor at input and output
• Keep trace lengths short for optimal PSRR
• Use ground plane for best noise performance

In Industrial Environments

For harsh industrial applications:

• Consider additional bulk capacitance (10 F) for input
• Ensure proper heat dissipation at high ambient temperatures
• Implement input transient protection if necessary

Comparative Advantages

The TPS72325DBVR outperforms competing regulators with:

Feature	TPS72325DBVR	Typical Competitor
Dropout Voltage	0.5V	0.8V
Quiescent Current	200 A	500 A
PSRR	65dB	50dB
Package Size	SOT-23-5	SOT-89

Design Resources and Support

Texas Instruments provides comprehensive support for the TPS72325DBVR:

• Detailed datasheet with application circuits
• SPICE simulation models
• Evaluation module (EVM) availability
• Webench Power Designer tool support

Purchasing Information

The TPS72325DBVR is available through:

• Texas Instruments authorized distributors
• Major electronic component suppliers
• Direct from TI webstore

Package options include tape and reel for high-volume production.

Conclusion

The TPS72325DBVR represents the pinnacle of negative voltage regulation technology, combining Texas Instruments' expertise in power management with cutting-edge semiconductor design. Its exceptional electrical characteristics, robust protection features, and compact form factor make it the ideal choice for engineers designing:

• Precision measurement equipment
• Industrial control systems
• Portable medical devices
• Automotive electronics
• Communications infrastructure

For designers requiring stable, efficient negative voltage regulation in space-constrained applications, the TPS72325DBVR delivers unmatched performance and reliability.